Combined swage and casing-spear.



' Patented Mar. H, I902. E. NURTH.

COMBINED SWAGE AND CASING SPEAR.

(Application filed Sept. 15. 1900.\ (No Model.)

UNITED STATES PaTnT' Trice.

.EDWVAl-tD NORTH, OF LOS ANGELES, CALIFORNIA.

COMBINED SWAGE AND CASING-HSPEAR.

SPECIFICATION forming part of Letters Patent No. 695,169, dated March11, 1902. Application filed September 15, 1900. Saris-1N0. 80,177. (Nomodel.)

To all whom it may concern:

Be it known that I, EDWARD NORTH, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented a new and useful Combined Swage andCasing-Spear, of which the following is a specification.

An object of my invention is to provide a casing-spear so constructedthat a part of the same can be independently used as a swage tostraighten the casing and thenthe casingspear can be completed while theswage is in the casin g and can then be operated as a casin g-spear tothen withdraw the casing,'so that the operation of swaging the casingcan be performed without any interference by reason of the casing-spearattachment, and as soon as the casing has been straightened by the swagethe Workman can apply the necessary parts to constitute with the swage2. casing-spear inside the casing withoutfirst withdrawingthe swage.

Another object attained by this invention I is that the swaging andwithdrawing of the casingis accomplished by practically one tool,

and therefore the expense. of two tools is avoided and a great economyin time is also gained.

The object of my invention is to provide superior, more economical,convenient, and

' effective means for removing casings from Wells.

In the use of casing-spearsit is usually necessary to first employaswage for straightening the casing before the spear is lowered into thecasing. In my invention I propose to utilize the swage as the mandrel ofthe easing-spear, thereby greatlycheapenin g the appliances necessaryforthe operation of lifting or drawing the casi r It often occurs that acasing requires to be straightened by a swage without having to beafterward withdrawn, and it is therefore necessary to have a swage whichcan be used independently of the casing-spear.

An object of myi invention is to provide a casing-spear which is soconstructed that the spearing appliance need not be put into the casingor used in connection with the swage except when it is necessary tooperate with the casing-spear. By my invention the slips} which areconstructed at far less cost ordinary casing-spear and which are muchlighter than the ordinary casing-spear, will be simply an adjunct to theswage proper,

and the swage will ordinarily be used as an ate the necessity ofwithdrawing the swage and .removing it from theltools in order to usethe casing-spear and to avoid the loss of time incurred by suchoperation.

The accompanying drawings illustrate my invention.

Figure I is a perspective view of my newlyinvented casing-spear in thecasing of a well, a fragment of which casing is shownin longitudinalmid-section. A fragment of the tools is shown in place. Fig. II isaperspective view of the slips and their supportingring removed from themandrel-body. Fig. III is a view of the mandrel detached.

The mandrel for my newly invented casingspear comprises anupwardly-tapering body a, which has a straightcylindrical mid-portion 1,an upWardIy-tapering conical portion 2, and a downwardly-taperingconical point Z) indicates the tools,-the same constituting the meansfor raising and lowering the said v tapering body or mandrel.

0 indicates a ring which surrounds the tools and is adapted to slide upand down in the casing above'the mandrel.

(l d d d' indicate a set of slips to lit inside the casing and aroundsaid upwardly-tapering body and adapted to be expanded by the conicalportion 2 of said body.

.c e c" e indicate rods respectively connecting. the slips with the ringand holding the slips at adotermined distance below said ring. The slipsare corrugated or otherwise roughened on the periphery in. a manner thanthe 1 common with casiug'spears for the purpose of .it will be loweredtothe place-where it is detaking hold of the casing when expanded by theconical body. spring-rods, with a tendency to hold the slips contractedto a diameter less than that of the casing they are intended to fit, andthe slips taper to correspond with the taper of the upwardly-extendingcone 2 of the body.

It is to be understood that I do not limit myself to the number or theparticular form of the slips shown in the drawings. Any other desirednumber may be used and any form may be employed which is-fonndsuitable," the important feature of my invention being that the slipsand the expanding mandrel are operated independently of each other, ashereinafter fully explained.

f indicates the sand-line for raising and lowering the slips. It ispreferably fastened to the top of theslip-supporting ring, as shown inthe drawings.

Preferably the rods 'will be welded to the slips and also to the ringand will have an in-' ward tension to hold the slips together,so thatthey will readily pass down the casing wit hout contact therewith. I

Preferably the swageor mandrel is provided with a downwardlyflaperingpoint 3, as shown; but it is to be understood that I do not. limitmyself to the particular form of mandrel shown, and I may use a bit orany other-tool or appliance that'will answer the purpose, the samebeingfurnished with a taper portion toanswer the purpose'of the portionmarkedfl in the drawings.

In practical operation the mandrel or swage sired to take hold of thecasing, and as it passes down it serves the samepurpose as that servedby the ordinary swage in' the former practice of ;the art. Then theslips Will be lowered to rest on the conical; portion or shoulder 2 ofthe mandrel, and they are thus expanded against the casing. Then themandrel is drawn up, thus wedging the slips into forcible contact withthe casing. The taper of tho mandrel and the slips is such that The rodsare preferably.

California,- this 8th the mandrel can be drawn up into such forciblecontact with the slips that the mandrel will be supported by itsfriction-with the-slips, which in turn are supported by their frictionwith the casing, thus allowing the mandrel to be held by friction fromlowering when the tools are lowered for the purpose of jarring. When themandrel has been drawn up tightly, so that it will not fall down, theoperator will operate the jars upward to loosen the casing and force itup.

.When it is desired to release the spear, the jars are operated to forcethe mandrel down out of its contact with the slips. As soon as themandrel has been Withdrawn from the slips the slips and the mandrel canbe drawn separately up out of the casing.

What I claim, and desire to secure by ters Patent of the United States,is-

Let-

r 1. Acombined'swage and casing-spear comprising a swage tapering at 7its upper end; means for raising and lowering the same; a set of slipsto fit inside the'casing and around said swage and adapted to beexpanded by the upwardlyrtapering portion of said swagey a ring whichwill pass freely up and down around the support of theswage; meansconnecting the slips with said ring; and means for lowering the slipsinto the well above the 'swage and withdrawing itout of the wellindependently of the swage or the tools thereto attached.

2. In a combined swage and casing-spear, the combination with a swagetapering at its upper end, of a set of slips, and means for applying theslips to and withdrawing them from the swage after the'swage has beenlowered into the well-casing.

In testimony whereof I have signed my name to this specification, i nthe presence of day'of September, 1900. EDWARD NORTH;

two subscribing witnesses, at Los Witnesses:

JAMES R. TOWNSEND, JULIA TOWNSEND.

